19.python设置单线程和多线程

1.单线程实例:

代码如下：

from time import ctime,sleep
def music(A):
    for i in range(2):
        print ("I was listening to %s. %s" % (A, ctime()))
        sleep(1)

def eat(B):
    for i in range(2):
        print ("I was eating the %s! %s" % (B, ctime()))
        sleep(5)

if __name__ == '__main__':
    music('一百万种可能')
    eat('apple')
    print("all over %s" % ctime())

2.多线程实例：

代码如下：

from time import ctime,sleep
import threading

def music(A):
    for i in range(2):
        print("I was listening to %s. %s" % (A, ctime()))
        sleep(1)

def eat(B):
    for i in range(2):
        print("I was eating the %s! %s" % (B,ctime()))
        sleep(5)

threads = []
th1 = threading.Thread(target=music, args=('That Girl',))
threads.append(th1)
th2 = threading.Thread(target=eat, args=('apple',))
threads.append(th2)

if __name__ == '__main__':

    for thread in threads:
        # 设置守护进程
        thread.setDaemon(True)
        thread.start()
    # 等待线程中止，在子线程完成运行之前，这个子线程的父线程将一直被阻塞
    thread.join()
    print('all over %s' % ctime())